LITOSSEQUÊNCIA DE SOLOS NA SERRA DA MOEDA, QUADRILÁTERO FERRÍFERO

Soil topolitosequence in the Moeda syncline, Quadrilátero Ferrífero

Abstract

We aimed to study the attributes of a soil topolitosequence at the west flank of Moeda syncline, Quadrilátero Ferrífero, in order to contribute to the knowledge of the soil distribution and to the soil science. Nine pedons of different parental materials and landscape were described and collected, and physical, chemical, mineralogical and micromorphological analyses were performed. The results showed that soils are dystrophic and have a great influence of the parental material, and whose hydraulic behavior increases pedogenesis, especially podzolization and hydromorphism; levels of trace elements at soils showed different results due to the parental materials, with high levels of chromium for soils from shale of the Nova Lima Group, and vanadium for soils originated or influenced by itabirite; the occurrence of lithogenic minerals in the coarse fractions, such as hematite and magnetite, was evidenced, the latter being related to the trace elements content. In addition, the microchemistry performed also suggests that titanium oxides constitute an important reserve of these elements; the Oxisols have a typical pedobiological microgranular structure, with a development and roundness of the aggregates influenced by soil mineralogy